Figure 26: Dc Power Supply - Juniper EX6210 Complete Hardware Manual

Complete Hardware Guide for EX6210 Ethernet Switches
50
WARNING: The switch is a pluggable type A equipment installed in a
restricted-access location. It has a separate protective earthing terminal
provided on the chassis. This separate protective earthing terminal must be
permanently connected to earth ground.
NOTE: All switch configurations of EX6200 switches are shipped with one
power supply. Cover panels are installed over the remaining three power
supply slots. Additional power supplies can be added to the switches as
necessary. For details about different switch configurations, see
Switch Configurations" on page
Each DC power supply weighs approximately 7 lb (3.2 kg) and has a pair of DC input lugs
on the front of the power supply. Each power supply also has an
and three LEDs on the faceplate that indicate the status of the power supply. See
Figure 26 on page 50.

Figure 26: DC Power Supply

Captive screws
INP UT
OUT PUT
FAIL
OK
OK
Positive
input terminal
Negative
input terminal
NOTE: A 2100 W DC power supply requires a dedicated 60 A circuit breaker
for each input DC feed.
Each DC power supply connects to the backplane in an EX6200 switch. The backplane
in an EX6200 switch distributes the output power produced by the power supplies to
different switch components. Each DC power supply provides power to all the components
in the switch.
Each DC power supply has its own fan and is cooled by its own internal cooling system.
The airflow is from the front of the power supply to the back. Hot air exhausts from the
rear of the chassis.
The power configuration recommended for an EX6200 switch is an N+1 power
configuration. In an N+1 power configuration, if one power supply fails or is removed, the
remaining power supplies (N) continue to supply power for the system without
interruption.
7.
Handle
Copyright © 2014, Juniper Networks, Inc.
"EX6210
Enable switch, a fan,